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EP4210884A1 - Installation et procédé de coulée continue et de laminage ultérieur d'un feuillard d'acier - Google Patents

Installation et procédé de coulée continue et de laminage ultérieur d'un feuillard d'acier

Info

Publication number
EP4210884A1
EP4210884A1 EP21777215.1A EP21777215A EP4210884A1 EP 4210884 A1 EP4210884 A1 EP 4210884A1 EP 21777215 A EP21777215 A EP 21777215A EP 4210884 A1 EP4210884 A1 EP 4210884A1
Authority
EP
European Patent Office
Prior art keywords
steel strip
hot
austenitic
rolled
rolling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21777215.1A
Other languages
German (de)
English (en)
Other versions
EP4210884C0 (fr
EP4210884B8 (fr
EP4210884B1 (fr
Inventor
Hartmut Hof
Ingo Schuster
Matthias Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4210884A1 publication Critical patent/EP4210884A1/fr
Application granted granted Critical
Publication of EP4210884C0 publication Critical patent/EP4210884C0/fr
Publication of EP4210884B1 publication Critical patent/EP4210884B1/fr
Publication of EP4210884B8 publication Critical patent/EP4210884B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/142—Plants for continuous casting for curved casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C21D8/0215—Rapid solidification; Thin strip casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0231—Warm rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/60—Continuous furnaces for strip or wire with induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2261/00—Machining or cutting being involved
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a system and a method for the endless casting and subsequent flat rolling of a steel strip with an austenitic and/or ferritic microstructure and a thickness of less than 1.0 mm, preferably with a thickness of less than 0.80 mm, particularly preferably with a thickness in the range of 0.40 to 0.60mm.
  • Steel strips of this type are usually produced by cold-rolling hot strips in separate cold-rolling mills, so that at least two or three processing steps are necessary to produce such thin steel strips with an austenitic and/or ferritic microstructure.
  • the object of the present invention is to provide a plant that is improved compared to the prior art and a method that is improved compared to the prior art, in particular to provide a plant or a method that enables the production of a steel strip with an austenitic and/or or ferritic microstructure and a thickness of less than 1.0 mm.
  • the object is achieved by a system having the features of patent claim 1 and by a method having the features of patent claim 8 .
  • the system according to the invention which is intended and/or suitable for the endless casting and subsequent flat rolling of a steel strip with an austenitic and/or ferritic microstructure and a thickness of less than 1.0 mm, comprises a casting device with which a raw steel strip with a thickness in the range of 1.50 to 4.0 mm can be cast continuously, as well as at least one hot rolling mill coupled to the casting device, with which the raw steel strip can be hot-rolled into the steel strip in the austenitic and/or ferritic microstructure immediately after the casting process.
  • the system comprises at least one rolling module which is arranged immediately after the hot rolling stand coupled to the casting device and has a cooling device, a heating device and a hot rolling stand in this order, with which the rough-rolled steel strip is hot finish-rolled in the austenitic and/or in the ferritic microstructure range to form the steel strip can.
  • the present invention provides a method for producing a steel strip with an austenitic and/or ferritic microstructure and a thickness of less than 1.0 mm, wherein initially a raw steel strip with a thickness in the range from 1.50 to 4.0 mm is cast continuously in a casting device , and then hot pre-rolled directly in the austenitic and/or in the ferritic microstructure range, preferably above a temperature of at least 700° C., by means of at least one hot rolling stand coupled to the casting device to form the steel strip.
  • the steel strip which is then hot-rolled in the austenitic and/or in the ferritic microstructure range, is austenitic and/or ferritically hot finish-rolled to form the steel strip.
  • the system and the method enable greater economic efficiency in the production of hot strip, in particular in the production of ultra-thin hot strip, since the delivery times are significantly reduced due to the savings in process steps Investment costs are reduced and significant energy savings can be achieved.
  • austenitic and/or ferritic microstructure is understood in the context of the present invention to mean that the steel strip to be produced has an austenitic or a ferritic microstructure at the end of the process and is rolled austenitically and ferritically during production can be. In other words, at the end of the process, the steel strip to be produced essentially has no mixed structure of an austenitic and ferritic microstructure.
  • ultra-thin hot strip means a steel strip which is less than 1.0 mm thick, preferably less than 0.80 mm thick, particularly preferably in the range from 0.40 to 0.60 mm thick.
  • the steel strip which has an austenitic and/or ferritic microstructure, very particularly preferably has a thickness of 0.4 mm.
  • an austenitic and/or ferritic microstructure can be set in the steel strip in a targeted manner via the at least one rolling module.
  • the austenitic or ferritic hot pre-rolled steel strip is cooled in the cooling device before it is then ferritically finish-rolled in the roll stand of the rolling module, preferably in a temperature range of 700 to 780 °C.
  • the austenitically or ferritically hot pre-rolled steel strip is heated by the heating device before it is finish-rolled austenitically in the roll stand of the rolling module, preferably above a temperature of 850 °C.
  • the system can comprise at least two, more preferably at least three rolling modules arranged one behind the other, each of the rolling modules having a cooling device, a heating device and a hot rolling stand in this order in order to carry out hot rolling in an austenitic and/or ferritic microstructure to allow.
  • the total degree of deformation in the respective austenitic and/or ferritic microstructure area can be varied by the number of deformations used, as a result of which the quality parameters of the steel strip can be advantageously influenced.
  • system can also comprise a heating device arranged between the casting device and the hot rolling stand coupled to the casting device, in order to enable targeted interim heating of the raw steel strip coming from the casting device before it is austenitically hot pre-rolled in the hot rolling stand.
  • the plant preferably comprises at least one cooling section, via which the steel strip is cooled to a coiling temperature.
  • the plant comprises at least one coil device, more preferably at least two coil devices, via which the finished steel strip is wound into a coil.
  • the installation usually also has a separating device arranged upstream of the coil device for separating the steel strip.
  • the system can also comprise a pickling device for pickling and/or a heat treatment device for annealing the steel strip, which is then arranged between the, preferably last, rolling module and the cooling section.
  • the present invention also relates to the use of the system according to the invention for the targeted production of a steel strip with an austenitic and/or ferritic microstructure and a thickness of less than 1.0 mm, preferably with a thickness of less than 0.80 mm, particularly preferably with a thickness of Range from 0.40 to 0.60 mm. fiqure designation
  • FIG. 2 shows a second embodiment of the system according to the invention.
  • FIG. 1 shows an embodiment variant of a plant 1, by means of which a steel strip 2 with an austenitic and/or ferritic microstructure with a thickness of less than 1.0 mm can be produced by endless casting and subsequent flat rolling.
  • the system 1 comprises a casting device 3 which is continuously supplied with a molten steel.
  • a raw steel strip 4 with a thickness in the range from 1.50 to 4.0 mm is first continuously cast via the casting device 3 .
  • a first heating device 5 is arranged behind the casting device 3 in the direction of strip travel, via which the raw steel strip 4 can be heated before the first rolling pass if the temperature should be below 700 °C and/or if the first forming step is to be carried out in the austenitic microstructure range.
  • the first heating device 5 can be designed, for example, in the form of an inductive heating device.
  • the system 1 includes a first hot rolling stand 6 which is coupled directly to the casting device 3 .
  • first hot rolling stand 6 is arranged in the strip running direction directly behind the casting device 3, so that the raw steel strip 4 produced by the casting device 3 directly and can therefore be hot pre-rolled in the austenitic and/or ferritic microstructure range.
  • Plant 1 also includes a first rolling module 7 downstream of the first hot rolling stand 6 in the direction of strip travel, which has a first cooling device 8, a second heating device 9 and a second hot rolling stand 10 in this order, with which the austenitic and/or ferritic pre-rolled steel strip 2 in the austenitic and/or ferritic structure area is hot finish-rolled to form the steel strip 2.
  • the second heating device 9 can also be designed, for example, in the form of an inductive heating device.
  • the first cooling device 10 can be designed, for example, in the form of an interstand cooling system.
  • the system 1 Downstream of the first rolling module 7 in the direction of strip travel, the system 1 first comprises a cooling section 11, which is preferably designed in the form of a spray cooling system and by means of which the steel strip 2 rolled to the desired final strip thickness, for example a final strip thickness of 0.4 mm, due to the very small thickness, can be carefully cooled.
  • the steel strip 2 then runs through a separating device 12, which can consist of flying shears, for example, and is wound up into a coil via a first and/or a second coil device 13, 14.
  • Figure 2 shows a second embodiment of the plant 1 according to the invention, which, in contrast to the first embodiment, comprises a second rolling module 15, which also has a second cooling device 16, a third heating device 17 and a third hot rolling stand 18, via which rolling in austenitic and/or ferritic microstructure is made possible.
  • a raw steel strip 4 with a thickness of 2.0 mm and a width of 1100 mm was first cast using the plant 1 shown in FIG.
  • the raw steel strip 4 had a temperature of 1250° C. when leaving the casting device 3 and was then heated by an induction heater 5 from an entry temperature of 1157° C. to 1246° C.
  • the raw steel strip 4 was then austenitically hot rough-rolled at a rolling speed of 2.52 m/s in the first hot rolling stand 6 with a reduction of 55%, the entry temperature being 1130° C. and the exit temperature being 971° C.
  • the then obtained 0.9 mm thick, austenitically pre-rolled steel strip 2 was then finish-rolled via the first rolling module 7 by first heating it via the induction heater 9 from 938 °C to a temperature of 1051 °C and then at a rolling speed of 3.78 m/s in the second hot rolling stand 10 has been finish-rolled austenitically hot with a reduction of 33%.
  • the entry temperature to the second hot rolling stand 10 was 992°C and the exit temperature was 882°C.
  • a raw steel strip 4 with a thickness of 2.0 mm and a width of 1100 mm was first cast using the plant 1 shown in FIG.
  • the raw steel strip 4 had a temperature of 1250 ° C when leaving the casting device 3 and was fed to the hot rolling stand 6 without heating due to the sufficiently high temperature and was pre-rolled austenitically hot with a reduction of 55% at a rolling speed of 2.22 m/s, with the inlet temperature was 1020 °C and the outlet temperature was 882 °C.
  • the then obtained 0.9 mm thick, austenitically pre-rolled steel strip 2 was then ferritically finish-rolled via the first rolling module 7 by first cooling it via the cooling device 8 from 794 °C to a temperature of 785 °C and then at a rolling speed of 3.33 m/s in the second hot rolling stand 10 with a reduction of 33% has been.
  • the entry temperature to the second hot rolling stand 10 was 757°C and the exit temperature was 705°C.
  • first coil device 14 second coil device

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

La présente invention concerne une installation (1) et un procédé de coulée continue et de laminage ultérieur d'un feuillard d'acier (2) présentant une microstructure austénitique et/ou ferritique et une épaisseur inférieure à 1,0 mm, comprenant un dispositif de coulée (3), avec lequel un feuillard d'acier brut (4) ayant une épaisseur comprise dans la plage de 1,50 à 4,0 mm peut être coulé en continu, et également au moins un support de laminage à chaud (6), qui est accouplé au dispositif de coulée (3) et avec lequel le feuillard d'acier brut (4), toujours dans la plage de structure austénitique et/ou ferritique, peut être pré-laminé à chaud directement après l'opération de coulée pour former le feuillard d'acier (2) au moins un module de laminage (7), qui est disposé directement en aval de la cage de laminage à chaud (6) accouplé au dispositif de coulée (3), présente, dans la séquence donnée, un dispositif de refroidissement (8), un dispositif de chauffage (9) et une cage de laminage à chaud (10), avec laquelle le feuillard d'acier pré-laminé (2) dans la plage de structure austénitique et/ou ferritique peut être laminé à chaud à l'état chaud pour former le feuillard d'acier (2).
EP21777215.1A 2020-09-08 2021-09-08 Procédé de coulée continue et de laminage ultérieur d'un feuillard d'acier Active EP4210884B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020211273 2020-09-08
PCT/EP2021/074656 WO2022053482A1 (fr) 2020-09-08 2021-09-08 Installation et procédé de coulée continue et de laminage ultérieur d'un feuillard d'acier

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EP4210884A1 true EP4210884A1 (fr) 2023-07-19
EP4210884C0 EP4210884C0 (fr) 2024-08-07
EP4210884B1 EP4210884B1 (fr) 2024-08-07
EP4210884B8 EP4210884B8 (fr) 2024-09-18

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Country Status (6)

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US (1) US20240278298A1 (fr)
EP (1) EP4210884B8 (fr)
JP (1) JP7559225B2 (fr)
CN (1) CN116018219A (fr)
DE (1) DE102021209879A1 (fr)
WO (1) WO2022053482A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996001710A1 (fr) * 1994-07-08 1996-01-25 Ipsco Inc. Procede de coulee et de laminage d'acier au moyen d'une machine de coulee a deux cylindres
DE19758108C1 (de) * 1997-12-17 1999-01-14 Mannesmann Ag Produktionsverfahren und -anlage zur endlosen Erzeugung von warmgewalzten dünnen Flachprodukten
FR2798871B1 (fr) * 1999-09-24 2001-11-02 Usinor Procede de fabrication de bandes d'acier au carbone, notamment d'acier pour emballages, et bandes ainsi produites
DE102006002505A1 (de) * 2005-10-31 2007-05-03 Sms Demag Ag Verfahren und Fertigwalzstraße zum Warmwalzen von Eingangsmaterial
EP2340897A1 (fr) 2009-12-23 2011-07-06 Voestalpine Grobblech GmbH Procédé de traitement thermomécanique pour tôles épaisses
CN103305759B (zh) 2012-03-14 2014-10-29 宝山钢铁股份有限公司 一种薄带连铸700MPa级高强耐候钢制造方法

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EP4210884C0 (fr) 2024-08-07
WO2022053482A1 (fr) 2022-03-17
EP4210884B8 (fr) 2024-09-18
JP7559225B2 (ja) 2024-10-01
JP2023540982A (ja) 2023-09-27
CN116018219A (zh) 2023-04-25
US20240278298A1 (en) 2024-08-22
DE102021209879A1 (de) 2022-03-10
EP4210884B1 (fr) 2024-08-07

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